Real Companhia Velha
- Producers of Port and the largest owner of the premium land in the Douro Valley.

Rozès Porto
- Includes a profile of this Port producer, along with descriptions of wines, a list of distributors, and a few recipes.

Smith Woodhouse Port
- Founded in 1784, Smith Woodhouse has consistently been judged as one of the finest of all Vintage Port producers.

Sogrape
- Produces table and fortified wines, under numerous brand names, including Mateus, Offley, and Sandeman. Includes a company profile, along with information about the vineyards and brands. [Flash required]